update it so that archiving a form forces sync of those cases to phones

http://manage.dimagi.com/default.asp?110307

This is done by adding a system action to the case history representing
the rebuild.

also added and updated tests for this
bump couchforms version
Merge pull request #213 from dimagi/archive-sync

update it so that archiving a form forces sync of those cases to phones
Merge remote-tracking branch 'origin/pretty-user-display' into autostaging